506 PYCNOGONIDA . CHAP, 
In Ammothea and its allies they are extremely rudimentary 
in the adult, being reduced to tiny knobs in Yanystylum and 
Fic. 266.—A, B, Chelophores of Ascorhynchus abyssi, G.O.S. A, Young; B, adult. 
(After Sars.) .C, Anterior portion of Animothea hispida, Hodge, Jersey: late 
larval stage (= Achelia longipes, Hodge), showing complete chelae. D, Chela of 
Eurycide hispida, Kr. 
Trygaeus, and present as small two-jointed appendages in Ammo- 
thea; in this last, if not in the others also, they are present in 
complete chelate form in the later larval stages. 
In Eurycide, Ascorhynchus, and Barana they are usually less 
atrophied, but yet comparatively small and with imperfect chelae, 
while in some Ascorhynchi (A. minutus, Hoek) they are reduced 
to stumps. 
In Pallenopsis the scape of the chelophore consists of two 
joints, as also in Decolopoda and some Ascorhynchus: in Nymphon, 
Fic. 267.—Chelae of species of Nymphonidae: A, Mymphon brevirostre, Hodge; B, 
Boreonymphon robustum, Bell; C, Chaetonymphon macronyz, G.O.S. ; D, Nymphon 
elegans, Hansen. 
Phoxichilidium, Pallene, and Cordylochele of one only; in all 
‘furnished with a pair of distinctly three-jointed mandibles ; and the specimen 
was the largest of the three obtained.” 
